:root {
  --bg: #0b1220;
  --card: #111b2e;
  --text: #e8edf5;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent2: #a78bfa;
  --line: #1e293b;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px 80px;
}

header.hero {
  padding: 72px 0 48px;
  text-align: center;
  border-bottom: 1px solid var(--line);
  background: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(56, 189, 248, 0.25), transparent);
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hero p.lead {
  margin: 0 auto;
  max-width: 640px;
  color: var(--muted);
  font-size: 17px;
}

nav.top {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(11, 18, 32, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

nav.top .inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.logo {
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
}

.nav-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--muted);
  font-size: 14px;
}

.nav-links a:hover {
  color: var(--accent);
  text-decoration: none;
}

section {
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
}

section:last-of-type {
  border-bottom: none;
}

h2 {
  margin: 0 0 8px;
  font-size: 24px;
}

.section-desc {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 15px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px 24px;
}

ul.feature-list {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

ul.feature-list li {
  margin-bottom: 8px;
}

table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

table.data th,
table.data td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}

table.data th {
  color: var(--muted);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

table.data tr:hover td {
  background: rgba(56, 189, 248, 0.06);
}

.loading,
.error {
  color: var(--muted);
  font-size: 14px;
  padding: 16px 0;
}

.error {
  color: #f87171;
}

.muted {
  color: var(--muted);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.contact-item {
  padding: 16px;
  border-radius: 10px;
  background: var(--card);
  border: 1px solid var(--line);
}

.contact-item .label {
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.contact-item .value {
  margin-top: 6px;
  font-size: 16px;
}

footer {
  text-align: center;
  padding: 32px 20px;
  color: var(--muted);
  font-size: 13px;
}

.cta-row {
  margin-top: 20px;
}

.btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 8px;
  background: var(--accent);
  color: #0b1220 !important;
  font-weight: 600;
  font-size: 14px;
  border: none;
  cursor: pointer;
  text-decoration: none !important;
}

.btn:hover {
  filter: brightness(1.08);
}

.btn-secondary {
  background: transparent;
  color: var(--accent) !important;
  border: 1px solid var(--accent);
  margin-left: 10px;
}